/**
 *    Copyright 2009-2021 the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package ognl.util;

import java.util.Collection;

public class OgnlUtils {

    public static boolean isEmpty(Object o) {

        System.out.println("我进入OgnlUtils里面了");
        if (o==null) {
            return true;
        }
        if (o instanceof Collection) {
            if (((Collection) o ).isEmpty()) {
                return true;
            }
        } else if (o instanceof String) {
            if (((String)o).trim().length()==0) {
                return true;
            }
        }

        return false;
    }
}
